Past Card Sets Weren't Any Less Confusing...

Since I have some time off from teaching, I've dedicated a bit of time towards organizing, collating, and now (finally) putting my 1991 Topps set into binder pages.  As I was doing so, I ran across this oddity:

Both cards are #337, in fact, everything about the card is the same except the team (and corresponding team color border).  Notice in both cases Comstock is pictured as a Mariner.  

I did a little research (after initially typing I wouldn't - at least that part has been struck from the post) and found the following information about the 1991 Topps set (all courtesy of keymancollectibles):

Card 49A Pat Borders (1986 - 40 steals in Kinston) 49B (0 Steal in Kinston)

Card 80A Fernando Valenzuela (104 ER in '90 Tied League Lead) 80B (Led League)

Card 97A Brady Anderson (Sept 2 RBI and 3 Hits) 97B (Set, 3 RBI and 14 Hits)

Card 100A Don Mattingly (10 hits in 1990) 100B (101 hits in 1990)

Card 131A Checklist 1 (#727 Phil Bradley) 131B (#727 Mookie Wilson)

Card 155A Dwight Evans ( Lead league w/162 games in 1982) 155B (tied for lead.....)

Card 167A Randy Tomlin (Harriburg) 167B (Harrisburg)

Card 236A Frank Tanana (Tied for lead w/269 K’s on 1975) 236B (Lead League w/269....)

Card 270A Mark McGwire (1987 Slug % 618) 270B (1987 Slug % .618)

Card 279A Jose Gonzalez (Photo Billy Bean) 279B (correct photo)

Card 306A Lonnie Smith (136 Games in 1990) 396B (135 Games in 1990)

Card 324A Ron Kittle (set another standard) 324B (tied another standard)

Card 337A Keith Comstock (Cubs logo on front) 337B (mariners logo on front)

Card 366A Checklist 3 (#19 Carl Nichols) 366B (#119 Carl Nichols)

Card 378A Wilson Alvarez (89 & 90 minor league stats deleted) 378B (stats included)

Card 454A Kevin Appier (1990 Omaha Stats deleted 454B (stats included)

Card 526A Moises Alou (37 runs in 2 games for 1990 Pirates 526B (0 Runs in 2 games)

Card 527A Checklist 4 (#105 Keith Miller #719 Kevin McReyolds 527B (#105 Kevin McReyolds #719 Keith Miller)

Card 593A Mike Walker (1990 Canton Stats deleted 593B (Stats included)

Card 599A Greg Myers (1990 Syracuse stats deleted 599B (Stats included)

Card 603A Wes Chamberlain (Photo Louie Meadows) 603B (correct photo)

Card 656A Checklist 5 (348 Palacios, 381 Lind, 537 Lavalliere) 656B (438 Palacios 537 Lind 665 Lavalliere) 656C (433 Palacios) 

CardA 674 Kevin Gross (1988 Tied for lead) 674B (1988 Lead league)

Card 687A John Cerutti (4.46 ERA in 1990) 687B (4.76 ERA in 1990)

Card 692A Efrain Valdez (Born 6/11/66) 692B (Born 7/11/66)

Card 706A Brad Arnsberg (68.2 IP in 1990) 706B (62.2 IP in 1990)

Card 780A Randy Myers (15 Career losses) 780B (19 Career losses)

Apparently, I found the only variation that would be immediately visible by inspection (though the Jose Gonzalez and Wes Chamberlain photo cards should be rather easy to spot...assuming I knew what either man looked like - which I don't).  All I know is I'm happy to have all 792 cards - and I'm not about to chase after fixed and error cards from a "junk" set twenty years old!